<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/IMG_045.jpg" alt="头像"/>
      </div>

      <el-form label-width="0px"class="login_form"
      ref="loginFormRef"
      :model="loginFrom":rules="loginFromRules" >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user"
          v-model="loginFrom.username" ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginFrom.password" ></el-input>
        </el-form-item>
        <!-- 登录 -->
        <el-form-item class="btns">
          <el-button type="primary" @click='login' >登录</el-button>
          <el-button type="info" @click='resetLoginForm' >重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 数据绑定
      loginFrom: {
        username:'admin',
        password:'123456'
      },
      //验证规则
      loginFromRules:{
        username:[
           { required: true, message: '请输入登录名称', trigger: 'blur' },
           { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password:[
           { required: true, message: '请输入登录密码', trigger: 'blur' },
           { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]

      }
    }
  },
  methods:{
    //重置表单
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields()
    },
    //登录
    login(){
      //验证
      this.$refs.loginFormRef.validate(async valid => {
        if(!valid) return;
        //解构赋值获取返回的数据
        const {data:res}=await this.$http.post('login',this.loginFrom)
        if(res.meta.status!==200) return this.$message.error("登录失败")
        this.$message.success('登录成功！！！')
        //保存token到sessionstorage
        window.sessionStorage.setItem('token',res.data.token)
        this.$router.push('/home')
      })
    }

  }
}
</script>

<style lang="less" scoped>
  .login_container{
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);  //元素旋转，缩放，移动等，translate，2d
    .avatar_box{
      width: 130px;
      height: 130;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;  //添加阴影
      position: absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
.login_form{
  position: absolute;
  bottom: 0px;
  padding: 0 20px;
  width: 100%;
  box-sizing: border-box;
}

.btns{
  display: flex;
  justify-content: flex-end; //水平
}

</style>
